If possible, I would give 6 starts. It was not only good, but much more above that. I am airbnb host myself, and I will take a good lesson how to prepare room and how to take care of the guest.
Everything was perfect !

In details :
- Thongjuta is really nice, and she was open minded to accept my offer. Communication was very easy, nice and always fast response.
- Arranged check in was on time, well described how to get there, and I felt very welcome.
- Room is great ! Honestly - I will never book a hotel anymore in BKK if Thongjunta will be OK to host me again :) It has everything you need. Food supplies, drinking water, cleaning supplies, shower gel, shampoo, extra towels, extra blankets, slippers... etc etc. You can feel really like at home. Internet was very fast (I have checked on speed test - 35MB). Room has also its personal touch, something that hotel will never have.
- Building - it is a brand new condominium building. Looks very new and modern. Security guys jumping on their feet every time they see you, big lobby area. Very nice and big swimming pool (50m long I guess?), and good equipped fitness room.
- Location - it is just 3min walk to MRT station, which makes it super convenient. I bought 3 days MRT pass for unlimited rides for 230 baht, that gave me easy access to many shopping malls, nightlife, restaurants etc. And something that I discovered - Huai Khwang area is full of world class massage venues, where every men will feel like in heaven :) It is not my thing, but if some travelers are coming to BKK for this reason - this is the place to stay !
Don't worry, place itself is quiet and it is not a red light district ! 7/11 shop is nearby for most basic supplies, and street vendors selling local food.

I will definitely recommend this place to everyone. Great spot for any BKK traveler. Looking forward to stay there again.